> For the complete documentation index, see [llms.txt](https://docs.umbraco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbraco.com/umbraco-forms/16.latest/upgrading/version-specific.md).

# Version Specific Upgrade Notes

This article provides specific upgrade documentation for migrating to Umbraco Forms version 16.

{% hint style="info" %}
If you are upgrading to a minor or patch version, you can find the details about the changes in the [Release Notes](/umbraco-forms/16.latest/release-notes.md) article.
{% endhint %}

## Version Specific Upgrade Notes History

Version 16 of Umbraco Forms has a minimum dependency on Umbraco CMS core of `16.0.0`. It runs on .NET 9.

### Breaking changes

Version 16 contains a number of breaking changes. If you do run into any, they should be straightforward to adjust and recompile.

For reference, the full details are listed here:

#### Removed EPPlus dependency

Previous versions of Forms depended on EPPlus version 4, the last LGPL-licensed release, which is no longer supported. Newer versions require a commerce license, which is not desired for built-in Forms features (such as exporting form entries to formatted Excel files). The built-in export now uses CsvHelper to generate CSV files instead.

## Legacy version specific upgrade notes

You can find the version specific upgrade notes for versions out of support in the [Legacy documentation on GitHub](https://github.com/umbraco/UmbracoDocs/blob/umbraco-eol-versions/11/umbraco-forms/installation/version-specific.md).


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